Hello,
new here and I can't seem to find any info by searching so I'll ask. I picked up a complete Vortec 350 out of a 97 Suburban. I have the complete wiring harness, ECM and 4L60E and plan on running it in my 65 Chevelle.

My question is, is there anything "special" I will have to do to make the motor work in this application. I would prefer to eliminate all the extra emmisions stuff. I beleive the only thing that this motor has as far as emmisions is EGR, no smog or air pump. Does the ECM need to see a catalitic converter?

Anything you can add would be appreciated!

Thanks
Mark

 

97 MY, gets you into OBDII.
And that's a whole bundle of snakes for reprogramming. If you're going to use the stock PCM, then yes you have to have everything intact, or you'll have headaches.

Splicing in a 95 or earlier PCM gets you into the realm of a computer that mere mortals can work with.

Tunercat.com had a series of PCM editors, and with investigating you pdm choices you can then figure out what to use to get your desired reults.

 

Grumpy,
Thank you for your response, I appreciate it. You said I will have to have everything in tact. I know that includes the EGR, but would that also include, say the cat. converter? I think these were the only two emmisions things on the truck when it was removed.

In all honesty, if I only have to keep the EGR with the stock maninfolds to run it stock with the original PCM then I will probably go that route. This build is for a comfortable daily driver/cruiser and I am not looking to get as much hp and performance out of it as possible.

Thanks again
Mark

 

Yep, that OBDII needs a cat or it needs to think there`s one down there, your donor truck had two O2`s sorta speak one for feedback on mixture and the second for feedback on converter efficiency...Maybe you could getaway using some of those o2 simulators that that the mustink guys love so much?

 

Everything.
OBDII is a very intelligent system. It checks for feedback when it commands a change. Things like if it opens the EGR it wants to see a change in MAP. You can get away going without a cat but that's it. And the calibration might even be able to read the error from the difference in exhuast back pressure, vs what it thinks the MAP should be for a given condition.

Once you have it fully operational you might try disabling something, but to start off with to have an idea of where you really are, everything is going to have to be by the book, or you might go a little nutzo trying to figure out what's going on. Maybe not, but I've seen enough guys think they can outsmart GM, fail.

YMMV

 

Thanks,
I will plan on installing it as stock including the EGR and no cat. That sounds like it will work. Then like you said Grumpy, I can start trying to remove the EGR. I don't really think that having the EGR is going to effect performance noticably anyway.

Mark